diff options
Diffstat (limited to 'include/ec_commands.h')
| -rw-r--r-- | include/ec_commands.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/ec_commands.h b/include/ec_commands.h index 7b3fb170d1..f526accd00 100644 --- a/include/ec_commands.h +++ b/include/ec_commands.h @@ -1877,6 +1877,14 @@ struct ec_params_reboot_ec { * register determines which sensor is affected by the THRESHOLD and COMMIT * registers. The THRESHOLD register uses the same EC_TEMP_SENSOR_OFFSET scheme * as the memory-mapped sensors. The COMMIT register applies those settings. + * + * The spec does not mandate any way to read back the threshold settings + * themselves, but when a threshold is crossed the AP needs a way to determine + * which sensor(s) are responsible. Each reading of the ID register clears and + * returns one sensor ID that has crossed one of its threshold (in either + * direction) since the last read. A value of 0xFF means "no new thresholds + * have tripped". Setting or enabling the thresholds for a sensor will clear + * the unread event count for that sensor. */ #define EC_ACPI_MEM_TEMP_ID 0x05 #define EC_ACPI_MEM_TEMP_THRESHOLD 0x06 |